Some people have been disappointed in the product durability and warranty support. Others are frustrated with the preorders which were supposed to be shipping to customers in June and are now shipping. People are frustrated with the preorder issue because this isn't the first time and probably won't be the last. To gain back a customer base these new kv2's and ov2's would have to be outperforming everything else otherwise they probably will have a hard time gaining back customer satisfaction. I haven't had any problems with my flat cone k series personally but I was feeding each 10" only 300rms and they were in a sealed box which prevented any overpowering in my opinion and didn't require a subsonic filter.
I'm debating on whether I'll get an ov2 15" or a
http://www.stereointegrity.com magnum. I here that the price may drop on the magnum due to new dust cap I believe and I don't know what else. Just waiting to see how long the wait would be for the new magnum. If it's in the next few months I'll go for the magnum.